Abstract: Efficient, low cost and easily deployable monitoring systems for elderly people are becoming every day more and more important if considering that the increase in longevity has been raising the average age of the population all over the world. For elderly people, wrong postural behaviors can indicate a main and preliminary marker of disease. It is possible to recognize the signs of this kind of problems by developing smart home monitoring technologies: the body posture can be modeled using information resulting from specific low cost sensors embedded in a bed or an armchair. This paper presents a low cost Smartphone application, able to transform a bed or an armchair into an intelligent device. A friendly interface has been defined in order to make this application also suitable for unskilled users.